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scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak

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qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response
buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full
sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound
sg_copy_to_buffer() only fills as many bytes as the user request payload
provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The
options and unused[] fields are therefore copied out uninitialized,
leaking kernel heap contents to user space.

Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().

Fixes: ec89146215 ("qla2xxx: Add bsg interface to support D_Port Diagnostics.")
Cc: stable@vger.kernel.org
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Link: https://patch.msgid.link/20260723050413.3897522-54-njavali@marvell.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>
This commit is contained in:
Nilesh Javali
2026-07-23 10:34:10 +05:30
committed by Martin K. Petersen (Oracle)
parent f743488e4a
commit a152edab38
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/qla2xxx/qla_bsg.c
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@@ -2806,7 +2806,7 @@ qla2x00_do_dport_diagnostics(struct bsg_job *bsg_job)
!IS_QLA28XX(vha->hw) && !IS_QLA29XX(vha->hw))
return -EPERM;
dd = kmalloc_obj(*dd);
dd = kzalloc_obj(*dd);
if (!dd) {
ql_log(ql_log_warn, vha, 0x70db,
"Failed to allocate memory for dport.\n");